Category: 144690-92-6

We know that the rate of many reactions can be accelerated by catalysts. A catalyst speeds up the rate of a reaction by lowering the activation energy; in addition, the catalyst is regenerated in the process. 144690-92-6, molecula formula is C48H44N6O6, below Introduce a new synthetic route., 144690-92-6

Example 1 – formation of olmesartan medoxomil hydrobromide Form A Trityl olmesartan medoxomil (8 g, 10 mmol) is added to a mixture of acetone (35 ml) and water (10 ml). To the resulting suspension 48 % aqueous hydrobromic acid (3.5 ml, 30 mmol) is added. The mixture is then stirred at room temperature for 2 h. Water (130 ml) is added and the mixture is stirred for additional 30 minutes. The precipitated triphenylmethanol is filtered off. The filtrate is concentrated in vacuum at 40 C to 100 ml, and then stirred vigorously for 1 h at room temperature and then additional 30 minutes at 0 C. The precipitate is filtered to give 4.7 g of olmesartan medoxomil hydrobromide Form A (97.6 % area); Example 9 – formation of olmesartan medoxomil Trityl olmesartan medoxomil (18 g, 22.5 mmol) (95.5 % area) is added to a mixture of acetone (68 ml) and water (22 ml). To the resulting suspension 48 % aqueous hydrobromic acid (8.5 ml, 72 mmol) is added. The mixture is then stirred at room temperature for 2 h. Water (180 ml) is added and the mixture is stirred for additional 15 minutes. The precipitated triphenylmethanol is filtered off. The filtrate is concentrated in vacuo at 40 C to 200 ml and then stirred vigorously for 20 minutes at room temperature and then additional 40 minutes at 0 C. The precipitate is filtered and dried overnight in vacuum at 25 C to give 12.9 g of olmesartan medoxomil hydrobromide Form A. This was added to THF (150 ml) and the mixture is stirred vigorously for 30 minutes at room temperature and 1 hour at 0 C. The precipitate is filtered and washed with 25 ml of cold THF to give olmesartan medoxomil hydrobromide Form B, which is then dissolved in a mixture of water (100 ml) and acetone (50 ml). To a clear solution saturated aqueous NaHCO3 is added to raise pH to 5.6. The mixture is stirred for 1 hour at room temperature and 2 hours at 0 C. The precipitate is filtered, washed with water and then recrystallised from acetonitrile (87 ml) to give 8.3 g of olmesartan medoxomil (99.74 % area), 144690-92-6

With the rapid development of chemical substances, we look forward to future research findings about 144690-92-6

Reference£º
Patent; LEK Pharmaceuticals d.d.; EP2022790; (2009); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

A balanced equation for a chemical reaction indicates what is reacting and what is produced, but it reveals nothing about how the reaction actually takes place. The reaction mechanism is the process, or pathway, by which a reaction occurs.144690-92-6. An updated downstream synthesis route of 144690-92-6 as follows., 144690-92-6

Trityl olmesartan medoxomil (8 g, 10 mmol) is dissolved in THF (25 ml) and diethyl ether (25 ml) and 48 % aqueous hydrobromic acid (3.5 ml, 30 mmol) is added. The mixture is stirred for 1 hour at room temperature and then 1 hour at 0 C. The precipitate is filtered, washed with cold THF (20 ml) and dried overnight in vacuum at room temperature to give 5.0 g of olmesartan medoxomil hydrobromide Form B

The chemical industry reduces the impact on the environment during synthesis, Triphenyl methyl olmesartan, , I believe this compound will play a more active role in future production and life.

Reference£º
Patent; LEK Pharmaceuticals d.d.; EP2022790; (2009); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

To 3L reaction flask 165.3g above prepared 1 – [[[2- (triphenylmethyl) -2H- tetrazole-5-yl] biphenyl-4-yl] methyl] -2- propyl-4- (1-hydroxy-1-methylethyl) imidazole-5-carboxylic acid (5-methyl-2-oxo-1,3-dioxolen-4-yl) methyl ester ( compound ) and 1.90L70% acetic acid, mechanical stirring, heated to 50 , the reaction 2.5h, an ice bath was added 1.1L of water was stirred.Filtration, the filtrate with 300ml * 3 times extracted with methylene chloride, the methylene chloride phase 150mL ¡Á 5 times with 5% acetic acid solution was washed with acetic acid solution and extracted with 250ml of dichloromethane, and the combined organic phases.The solvent was distilled off under reduced pressure, the residue was added 380mL of ethyl acetate was heated with stirring and cooling to precipitate a solid.Suction filtered, the filter cake was dried in vacuo to give a white solid product to 89.6 g, weight yield was 77.8%.To a 1L reaction flask above 85g crude product olmesartan medoxomil, 420ml of tetrahydrofuran was heated at reflux, was added 360ml of ethyl acetate, the ice bath was stirred for crystallization.Filtration cake blast drying to constant weight to give the product as a white solid 74.8g, a yield of 83.5% by weight., 144690-92-6

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; Bengbu Tu Shan Fengyuan Pharmaceutical Co., Ltd.; Ma, Qisheng; Li, Baoqin; Sun, Peng; (18 pag.)CN105418593; (2016); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

1L glass reaction flask was added with 500ml of 75% acetic acid, 100.0g of intermediate 2 was added with stirring, and the mixture was heated to stirAfter 45-55 C, after 2 hours of incubation, reduce the temperature to 20-30 C, add 125ml of water, stir for 30 minutes, filter, filter cake with 100ml of 75% acetic acid, transfer the filtrate to 3L glass reaction bottle, The filtrate was successively added with 1000 ml of dichloromethane and 1000 ml of water, and the mixture was stirred and the organic layer was temporarily stored. The aqueous layer was extracted with 500 ml of dichloromethane, and the organic layer was combined. The organic layer was washed with 1000 ml of water, and the organic layer was washed with 5% carbonic acid. The aqueous sodium hydrogen solution was adjusted to rhoEta=6.0~7.0 (about 600 ml), and the organic layer was washed with 500 ml of water, and the organic layer was separated. The organic layer was concentrated under reduced pressure at 30-40 C until no significant solvent was discharged, and 300 ml was added. Ethyl acetate was stirred and crystallized at 20-30 C for 1 hour, filtered, and the filter cake was rinsed with 300 ml of ethyl acetate. The filter cake was blast dried at 40-50 C for 8 hours to obtain a white solid 60.0 g. (product), yield 86.0%, HPLC: 99.0%.

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; Jiashi (Hunan) Pharmaceutical Technology Co., Ltd.; Dai Yongzhi; Liu Hu; Zhu Laifa; Cai Jian; (8 pag.)CN108341804; (2018); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

A solution of MTT in 10 volumes of acetic acid (75%) was heated for 1.5 hrs at 60 C. until a pH of 2.21-2.23 was achieved, and the reaction was stirred until the amount of MTT was less than 2%. The mixture was evaporated to dryness. Ethyl acetate (EtOAc, 1 volume) was added to the residue and then evaporated again (twice). The resulting solid was dissolved in EtOAc (12 vol) and heated to reflux. The solution was cooled (2 C.) and stirred for 2 hrs. The product was filtered, washed (EtOAc, 1 vol), and dried on vacuum (45 C.)., 144690-92-6

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; Hedvati, Lilach; Pilarsky, Gideon; Shenkar-Garcia, Natalia; US2006/148870; (2006); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

A solution of MTT in an organic solvent and water (20%) was heated for 4-8 hrs at reflux. When the solvents were either acetonitrile (ACN), isopropyl alcohol (IPA) or t-butanol (t-BuOH), 1 volume of water was added, and the reaction was stirred until the amount of MTT was less than 2%. The mixture was evaporated to dryness. Ethyl acetate (EtOAc, 1 volume) was added to the residue and then evaporated again (twice). The resulting solid was dissolved in EtOAc (12 vol) and heated to reflux. The solution was cooled (2 C.) and stirred for 2 hrs. The product was filtered, washed (EtOAc, 1 vol), and dried on vacuum (45 C.). Table 1 shows the process details with different organic solvents: TABLE 1 Total solvent Time Solvent(s) Volume Temperature ( C.) (hrs) pH ACN:H2O 5:1 + 1 85 7 4.89-4.3 IPA:H2O 5:1 + 1 85 7 4.62-4.25t-BuOH:H2O 5:1 + 1 85 7 4.78-4.28n-propanol:H2O 5:1 reflux 2.5 4.3n-BuOH:H2O 5:1 110 2.5 4.412-BuOH:H2O 5:1 100 3 4.5iso-penthanol:H2O 5:1 100 3 5DMA:H2O 5:1 100 4 4.5DMF:H2O 5:1 100 4 4.5

A chemical reaction often occurs in steps, although it may not always be obvious to an observer.

Reference£º
Patent; Hedvati, Lilach; Pilarsky, Gideon; Shenkar-Garcia, Natalia; US2006/148870; (2006); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

To 3L reaction flask 165.3g above prepared 1 – [[[2- (triphenylmethyl) -2H- tetrazole-5-yl] biphenyl-4-yl] methyl] -2- propyl-4- (1-hydroxy-1-methylethyl) imidazole-5-carboxylic acid (5-methyl-2-oxo-1,3-dioxolen-4-yl) methyl ester ( compound ) and 1.90L70% acetic acid, mechanical stirring, heated to 50 , the reaction 2.5h, an ice bath was added 1.1L of water was stirred.Filtration, the filtrate with 300ml * 3 times extracted with methylene chloride, the methylene chloride phase 150mL ¡Á 5 times with 5% acetic acid solution was washed with acetic acid solution and extracted with 250ml of dichloromethane, and the combined organic phases.The solvent was distilled off under reduced pressure, the residue was added 380mL of ethyl acetate was heated with stirring and cooling to precipitate a solid.Suction filtered, the filter cake was dried in vacuo to give a white solid product to 89.6 g, weight yield was 77.8%.To a 1L reaction flask above 85g crude product olmesartan medoxomil, 420ml of tetrahydrofuran was heated at reflux, was added 360ml of ethyl acetate, the ice bath was stirred for crystallization.Filtration cake blast drying to constant weight to give the product as a white solid 74.8g, a yield of 83.5% by weight., 144690-92-6

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; Bengbu Tu Shan Fengyuan Pharmaceutical Co., Ltd.; Ma, Qisheng; Li, Baoqin; Sun, Peng; (18 pag.)CN105418593; (2016); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

1L glass reaction flask was added with 500ml of 75% acetic acid, 100.0g of intermediate 2 was added with stirring, and the mixture was heated to stirAfter 45-55 C, after 2 hours of incubation, reduce the temperature to 20-30 C, add 125ml of water, stir for 30 minutes, filter, filter cake with 100ml of 75% acetic acid, transfer the filtrate to 3L glass reaction bottle, The filtrate was successively added with 1000 ml of dichloromethane and 1000 ml of water, and the mixture was stirred and the organic layer was temporarily stored. The aqueous layer was extracted with 500 ml of dichloromethane, and the organic layer was combined. The organic layer was washed with 1000 ml of water, and the organic layer was washed with 5% carbonic acid. The aqueous sodium hydrogen solution was adjusted to rhoEta=6.0~7.0 (about 600 ml), and the organic layer was washed with 500 ml of water, and the organic layer was separated. The organic layer was concentrated under reduced pressure at 30-40 C until no significant solvent was discharged, and 300 ml was added. Ethyl acetate was stirred and crystallized at 20-30 C for 1 hour, filtered, and the filter cake was rinsed with 300 ml of ethyl acetate. The filter cake was blast dried at 40-50 C for 8 hours to obtain a white solid 60.0 g. (product), yield 86.0%, HPLC: 99.0%.

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; Jiashi (Hunan) Pharmaceutical Technology Co., Ltd.; Dai Yongzhi; Liu Hu; Zhu Laifa; Cai Jian; (8 pag.)CN108341804; (2018); A;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

A solution of MTT in 10 volumes of acetic acid (75%) was heated for 1.5 hrs at 60 C. until a pH of 2.21-2.23 was achieved, and the reaction was stirred until the amount of MTT was less than 2%. The mixture was evaporated to dryness. Ethyl acetate (EtOAc, 1 volume) was added to the residue and then evaporated again (twice). The resulting solid was dissolved in EtOAc (12 vol) and heated to reflux. The solution was cooled (2 C.) and stirred for 2 hrs. The product was filtered, washed (EtOAc, 1 vol), and dried on vacuum (45 C.)., 144690-92-6

Elementary reactions that involve the simultaneous collision of more than three molecules are highly improbable and have never been observed experimentally.

Reference£º
Patent; Hedvati, Lilach; Pilarsky, Gideon; Shenkar-Garcia, Natalia; US2006/148870; (2006); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.144690-92-6, molecula formula is Triphenyl methyl olmesartan, below Introduce a new synthetic route., 144690-92-6

A solution of MTT in an organic solvent and water (20%) was heated for 4-8 hrs at reflux. When the solvents were either acetonitrile (ACN), isopropyl alcohol (IPA) or t-butanol (t-BuOH), 1 volume of water was added, and the reaction was stirred until the amount of MTT was less than 2%. The mixture was evaporated to dryness. Ethyl acetate (EtOAc, 1 volume) was added to the residue and then evaporated again (twice). The resulting solid was dissolved in EtOAc (12 vol) and heated to reflux. The solution was cooled (2 C.) and stirred for 2 hrs. The product was filtered, washed (EtOAc, 1 vol), and dried on vacuum (45 C.). Table 1 shows the process details with different organic solvents: TABLE 1 Total solvent Time Solvent(s) Volume Temperature ( C.) (hrs) pH ACN:H2O 5:1 + 1 85 7 4.89-4.3 IPA:H2O 5:1 + 1 85 7 4.62-4.25t-BuOH:H2O 5:1 + 1 85 7 4.78-4.28n-propanol:H2O 5:1 reflux 2.5 4.3n-BuOH:H2O 5:1 110 2.5 4.412-BuOH:H2O 5:1 100 3 4.5iso-penthanol:H2O 5:1 100 3 5DMA:H2O 5:1 100 4 4.5DMF:H2O 5:1 100 4 4.5

A chemical reaction often occurs in steps, although it may not always be obvious to an observer.

Reference£º
Patent; Hedvati, Lilach; Pilarsky, Gideon; Shenkar-Garcia, Natalia; US2006/148870; (2006); A1;,
1,3-Benzodioxole – Wikipedia
Dioxole | C3H4O2 – PubChem